Once a candidate encounter has been identified, it is possible to get an estimation of the peculiar velocity of a binary in the case it was indeed born at that time and place, then kicked-out after undergoing a supernova event. During the orbit integration, we also kept track of the evolution of the velocity vector of each binary. Hence we could isolate the data points that fell within the age determination, and we computed the peculiar velocity by subtracting the Galactic co-rotation velocity that is given by [1]}. Depending on the size of the encounter age confidence interval, we obtained distributions made of ten to seventy-five thousand peculiar velocities, which we also characterized by their median, 16th and 84th percentiles to provide a single estimate of the peculiar velocity at the time of interaction with the spiral arms.
